Matching planer-head.



. pic,

- embodiment of toward To all whom it, may concern:

UNITED STATES. PATENT OFFICE.

Wisconsin, ASSIGNOR TO THE BERLIN MACHINE WORKS, OF BELOIT, WISCONSIN, A CORPORATION OF WISCONSIN.

MATCHING 'PLANER-HEAD,

Be it known that 1,.FRANKLIN L. LANE, a citizen of the United States, residing at Beloit, in the county of Rock and State of Wisconsimhave invented certain new and useful Improvements in Matching Planer- Heads, of which the following is a specificatiom. One of the featuresof this invention is the securing of planer knives in operati-ydposh tion with proper clearance by means ofsiminexpensive and eflicient holding or clamping means.-

In order that those skilled in the art may have a full and complete understanding of this invention, I have illustrated a desirable the same in the accompanying drawings forming a part cation, the invention-being shown in' such drawings in connection with a, matching planer-head, although it is to be understood that it is susceptible of useinmany other similar relations. a A i In the accompanying drawlngs, Figure 1 is a horizontal section on the-line 1 1 of the matching planer head shown tion in Fig. 2, some of the parts being omit ted for the sake of clearnss of illustration; Fig. 2 is a fragmentary side view of a matching planer-head equipped with my improved knife holding means, parts being omitted Fig. 3 is a fragmentary section on the line 33 of Fig.v 1 Fig. 4 is a similar section on the line 4-4. of Fig. 1,. through the lower part of the matching planer head; Fig. 5 is of the holding device; Fig. 6 is a back view of the knife shown in". Fig. 5; and Figs. 7 and 8 are perspective'views of the clamping.

or securing members of the holding con- :threads of which coijperate with those of a hole 23 extended through the arm. Along drawings consists 'of twovertically adjustable. parts 10 and. 11, having the scopin .hubs12 ed to Ft over an upright shaft not shown. The means for adjusting thGSQgtWO members and from. each other it is unnecessary to illustrate and describe because they are well understood inthe art. The two members 10 and 11 are each supplied with a. plurality of radially extended arms 14: and? L5 respectively, each of suchmembers inthe present instance I: arms, the two sets 4 two teleeq ii ped with. four mi m mala Specification of Letters Patent. Application filed September 26, 1910. 'SeriaI'No.

of this specifislightly as shown in Fig. sary to secure the'clearance, the teeth or serrations 20 are ineleva when the knife is held against properly placing the knife in I is, it acts as a in place, so that all will be held in the same position with ment.

, ing flange 24,

and l3- respectively, adaptsurface 25 which contacts with the outer lower portion of the same; that is, that part of the knife doing which .surface 27 of a raised portion 28 at the end PatentedAug. 27, 1912.

offset with relation to each other, I as is clearly indicated in the sectional plan view of Fig. 1, so that the various knives will out in series. The outer fiat face of each of the arms 14; of the member 10'is serrated at 16,

- that is, is provided with a considerable number of small V-shaped teeth extended longitudinally of the axis ofthe member and near one end of such face, the arm is' supplied with a short outstanding cylindrical guide pin 17. vEach of the groovingknives 18, which are extended beyond and adapted to be fastened to the ends ofthese outstanding arms, is grooved longitudinally at 19, such groove being of substantially the same width as the diameter of the pin 17, and the inner face of each of these knives is serrated or provided with a plurality of'small V-shaped teeth- 20, adapted to interfit with the teeth 16 of the-face of the arm, to hold the knife ,in proper position to give the desired clear ance. In order to tilt or incline these knives slightly diagonally disposed with relation to the axis of the knife, so that the arm 16 'it will be inclined or-cantedto a small extent, as is clearly shown. The pin 17 acts by coiiper 'ation. with the groove 19 to assist in guide in clamping the knives respect to vertical displace- Obviously,

knife in place against the end and to accomplish this I pro vide each knife held on the arm 14 by a. screw 22,. the

its outer edge the member 21 has a dependwith a beveled or under-cut face of the knife only near the center or the greatest amount of cutting and which is subjected to the greatest amount of strain. edge of the: clamping member 21 is supp-list: with a depending wedge flange. or rib 26, co-acts with thebeveled or wedge of the arm. It shoul be clear therefore,

5 and as is neces some means are necessary forwlth a clamping member 21 The other position; that it engages arms 15 of the lower planer head member 11 are muchlike those of the upper arms 14, with the exception that theparts are re versed, the lower grooving knives 29 being held in place against the serrated ends of the .each screw'and To those skilled in this art it will be' arms 15 by similar clainpsQl which, however, are used in reversed position as is shown in Fig. 4: and are adjustable by means of the screws passing through the arms 15, and engaging threaded holes 31 in the .clamps themselves, a washer 32 being preferably employed between the head of the top face of the arms.

apparent thatthe knife holding means illustrate'd and described 'will maintain the knives firmly and fixedly in operative position owing tothe wedge action of the clampingmeans used. It will furthermore period of time. 'matt-er to adjust be obvious that as the knives become worn down by grinding, they can be advanced along the serrated faces of the outwardly extended arms and used for a considerable Furthermore, it is an easy all of the knives to the same position, it-. being merely necessary to acter,

' cise structural have due regardio 'thesame inter-engagenient of theteeth on the arms and knives, the guide pins 17 acting'to hold the knives against vertical displacement during the tightening of the clamping means.

AlthoughI have shown grooving knives for matching planer heads in use in the constructions illustrated in the drawings, it,

will, of course, be readily understood that knives for providing tongues on the edges of boards may be as readily held in place by these same means as are the grooving knives. By the employment of this improved meansall of the knives are given e esired amount of clearance which is uniform for all knives and the latter may be canted or inclined from the axis of the head predetermined amounts without measure ment, by merely observing the proper interlocking of the teeth of the ends of the arms andv those on the inner faces of the knives. By employing a construction of this charthe knives may be ground down a considerable amount without destroying the eliiciency of the holding means herein set forth.

to be restricted to the pre features herein set forth in connection with this invention because they may be )changed within wide limits without sacrificing any of the'substantial benefits of I do not wish the invention and without departure from the essence thereof.

I claim:

1. The combination of a planer head having teeth, a planer knife having teeth interengaging with those of the head, cooperating means on the head and knife for grinding the knife when the latter is moved transversely to the teeth in positioning the same, and a clamping member embracing-a part of the head and at least a part of the knife to hold the same together.

2. A rotary cutter head stantially radial arm provided upon its having a subouter extremity with a set of transversely disposed teeth, a knife blade provided with a set of teeth interfitting with the teeth of the arm, one of said sets of teeth being obliquely disposed, means to secure the knife blade detachably to the arm, and a guide for use in positioning the knife blade, said guide including interfitting parts on the knife blade and the arm, substantially as described.

3. In a construction of the character described, the combination of a planer head having a plurality of teeth, a planer knife having a plurality of teeth adapted to mesh with those of the head, one of said sets of teeth being disposed slightly diagonally, means to clamp the knife in the canted position determined by said inter-meshing teeth to secure clearance, and pin and, groove guiding means for said knife, substantially as described.

4. The combination of a planer head having teeth thereon, a planer knife having teeth interengaging with those of the head, complimentary guiding means on the head and knife, and a clamping member embracing a part of the head and at least a part of the knife to hold the same together.

5. In a construction of the character described, the combination of a planer head having a plurality of teeth, a. planer knife having teeth adapted to mesh with those of said head. one of said sets of teeth being disposed slightly diagonally to maintain the knife canted sufficiently for clearance, a clamp for said knife having a wedge engagementwith said head, and means to tighten said clamp, substantially as described.

6. In a construction of the character, described, the combination of a planer head, a planer knife, a U-shaped clamp for said knife having a flange over-lapping the latter and undercut so as to form an engagement with the knife less in extent than the over-lapping of the knife by tl1e \flange. and means to tighten said clamflsnbstfintially as described.

7. The combination of a planer head and a planer knife, said head and knife having interengaging teeth arranged tohold the knife slightly canted, a clamp having a portion overlapping a part of said head and having a flange overlapping at least a portion of the lmife, said flange being under- 5 cut on the side which engages the knife.

8. In a construction of the character described, the combinationof a planer head having a plurality of teeth, a planer knife having a plurality of teeth adapted to mesh 19 with those of the planer head and maintain said head'canted sufliciently for clearance,

pin and groove guiding means for said a to tighten'said clamp, substantially as described. I

FRANKLIN L. LANE.

Witnesses:

'F. A. HORSTMANN, Tam Sounn.

Copies of this patent may he obtained for-five'cents each, by addressing the commissioner o1; Patents,

Washington, D. 0." 

